feat: Add R program to find longest substring without repeating characters #163
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Contributor
sgindeed
commented
Oct 8, 2025
sgindeed
commented
- Prompts the user to enter a string.
- Converts the string to lowercase (optional, for case-insensitive processing).
- Splits the string into individual characters.
- Uses a hash table to track the last seen index of each character.
- Implements a sliding window to find substrings without repeating characters.
- Computes and updates the length of the longest substring found.
- Displays the length of the longest substring without repeating characters.
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Pull Request Overview
This PR adds an R program that finds the length of the longest substring without repeating characters using a sliding window algorithm. The program prompts for user input, processes the string character by character, and uses a hash table to track character positions.
- Implements sliding window algorithm with hash table for character tracking
- Includes user input handling and case-insensitive processing
- Provides clear output showing the longest substring length
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